Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

■ You must define a function before using it.
 
■ Possible solutions:
 
  • Verify that the name of the function you are calling
    is spelled correctly.
 
  • Use the DECLARE statement to declare the function
    procedure and invoke argument data-type checking.
 
  • Use the DEF FN statement to define the function.
 
■ If you need additional help, move the cursor to a keyword
  and press F1 to open the Help window.